Upcoming F# book and event deals

Since I submitted my PhD thesis in December, I had a little bit of time to finish some of the things that I wanted to do for a really long time, but never quite found time to actually do them. This included getting the R provider to work on Mac and also creating a new web site for my various functional programming trainings and books. I even have a nice domain name:

• www.functional-programming.net

The page also discusses a couple of business reasons for looking into functional programming. So, if you're a business person wondering why you should send your developers on an F# course, the site has the answers for you too! (Or if you are developer and need a page for your boss.) The other place to check out is the official F# Software Foundation web page is another great resource and the testimonials hosted there.

The page has some information about the various trainings we're offering at fsharpWorks and about the two F# books I co-authored (Real-World Functional Programming and brand new F# Deep Dives). I'm happy that we can offer some special deals on both the books and the F# FastTrack course in London, so if you're considering getting into F#, now is a good time!

Library patterns: Why frameworks are evil

This article is a follow up to my previous blog post about functional library design, but you do not need to read the previous one, because I'll focus on a different topic.

In the previous article, I wrote about a couple of principles that I find useful when designing libraries in a functional style. This follows from my experience with building F# libraries, but the ideas are quite general and can be useful in any programming language. Previously, I wrote how multiple layers of abstraction let you build libraries that make 80% of scenarios easy while still supporting the more interesting use cases.

In this article, I'll focus on two other points from the list - how to design composable libraries and how (and why) to avoid callbacks in library design. As the title suggests, this boils down to one thing - build libraries rather than frameworks!

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